package com.cn.jdia.tas.utils;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.UUID;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.jeecgframework.poi.excel.ExcelExportUtil;
import org.jeecgframework.poi.excel.ExcelImportUtil;
import org.jeecgframework.poi.excel.entity.ExportParams;
import org.jeecgframework.poi.excel.entity.ImportParams;
import org.springframework.web.multipart.MultipartFile;

public class EasyPoiUtil {
	/**
	 * 功能描述：复杂导出Excel，包括文件名以及表名。创建表头
	 *
	 * @param list
	 *            导出的实体类
	 * @param title
	 *            表头名称
	 * @param sheetName
	 *            sheet表名
	 * @param pojoClass
	 *            映射的实体类
	 * @param isCreateHeader
	 *            是否创建表头
	 * @param fileName
	 * @param response
	 * @return
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			boolean isCreateHeader, HttpServletResponse response) {
		ExportParams exportParams = new ExportParams(title, sheetName);
		exportParams.setCreateHeadRows(isCreateHeader);
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * 功能描述：复杂导出Excel，包括文件名以及表名,不创建表头
	 * 
	 * @param list
	 *            导出的实体类
	 * @param title
	 *            表头名称
	 * @param sheetName
	 *            sheet表名
	 * @param pojoClass
	 *            映射的实体类
	 * @param fileName
	 * @param response
	 * @return
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			HttpServletResponse response) {
		defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
	}

	public static void exportExcelToMobile(List<?> list, String title, String sheetName, Class<?> pojoClass,
			String fileName, HttpServletResponse response, String path) {
		defaultExportToMobile(list, pojoClass, fileName, response, new ExportParams(title, sheetName), path);
	}

	/**
	 * 功能描述：Map 集合导出
	 *
	 * @param list
	 *            实体集合
	 * @param fileName
	 *            导出的文件名称
	 * @param response
	 * @return
	 */
	// public static void exportExcel(List<Map<String, Object>> list, String
	// fileName, HttpServletResponse response) {
	// defaultExport(list, fileName, response);
	// }

	/**
	 * 功能描述：默认导出方法
	 * 
	 * @param list
	 *            导出的实体集合
	 * @param fileName
	 *            导出的文件名
	 * @param pojoClass
	 *            pojo实体
	 * @param exportParams
	 *            ExportParams封装实体
	 * @param response
	 * @return
	 */
	private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
			ExportParams exportParams) {
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		if (workbook != null) {
			downLoadExcel(fileName, response, workbook);
		}
	}

	private static void defaultExportToMobile(List<?> list, Class<?> pojoClass, String fileName,
			HttpServletResponse response, ExportParams exportParams, String path) {
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		
//		System.out.println(path + fileName);

		try {
			FileOutputStream fout = new FileOutputStream(path+fileName);
			workbook.write(fout);
			fout.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		
	}

	/**
	 * 功能描述：Excel导出
	 * 
	 * @param fileName
	 *            文件名称
	 * @param response
	 * @param workbook
	 *            Excel对象
	 * @return
	 */
	private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
			workbook.write(response.getOutputStream());
		} catch (IOException e) {
			e.printStackTrace();
			// throw new RuntimeException(e);
		}
	}

	/**
	 * 功能描述：默认导出方法
	 * 
	 * @param list
	 *            导出的实体集合
	 * @param fileName
	 *            导出的文件名
	 * @param response
	 * @return
	 */
	// private static void defaultExport(List<Map<String, Object>> list, String
	// fileName, HttpServletResponse response) {
	// Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
	//
	// if (workbook != null)
	// ;
	// downLoadExcel(fileName, response, workbook);
	// }

	/**
	 * 功能描述：根据文件路径来导入Excel
	 * 
	 * @param filePath
	 *            文件路径
	 * @param titleRows
	 *            表标题的行数
	 * @param headerRows
	 *            表头行数
	 * @param pojoClass
	 *            Excel实体类
	 * @return
	 */
	public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
		// 判断文件是否存在
		if (StringUtils.isBlank(filePath)) {
			return null;
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		List<T> list = null;
		try {
			list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new RuntimeException("模板不能为空");
		} catch (Exception e) {
			e.printStackTrace();

		}
		return list;
	}

	/**
	 * 功能描述：根据接收的Excel文件来导入Excel,并封装成实体类
	 * 
	 * @param file
	 *            上传的文件
	 * @param titleRows
	 *            表标题的行数
	 * @param headerRows
	 *            表头行数
	 * @param pojoClass
	 *            Excel实体类
	 * @return
	 */
	public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,
			Class<T> pojoClass) {
		if (file == null) {
			return null;
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		List<T> list = null;
		try {
			list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new RuntimeException("excel文件不能为空");
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());

		}
		return list;
	}

}
